Pros and Cons of Three Different Display Methods For Getting a 3D Image

The popular method of creating a 3D image on a TV these days is to rapidly show two slightly different images one after the other. Each eye gets to see the correct image by way of glasses that rapidly block and unblock the image so each eye only gets to see one image at a time. As each eye sees the world from a slightly different perspective this effectively fools the brain into thinking that it is seeing an image with some depth.

The inherent problem with this technology is that first off you need expensive glasses and second you need a TV with a high refresh or scan rate. If you have a TV that is more than 4 or 5 years it is most likely not 3D capable. Many TV brands have their own specific models of shutter glasses so your next step is to invest in these. Unfortunately most families have at least 3 members. With my family I need to buy 6 pairs. Basically I’m investing almost the same amount of money spent on the TV on the shutter glasses just so we can all watch movies at the same time.

Thankfully technology moves onward and upward at a great rate of knots and new equipment is already coming into the market place which promises to solve all of these problems. New projectors and TVs are now available, albeit at a rather large cost, that use the same technique currently used in the movie theaters. Movie theaters work by projecting the image with polarized light. When the correct glasses are worn each eye only gets to see one picture each, both taken from a slightly different perspective. As both images are shown at the same time the refresh and scan rates of TVs is not as crucial.

Even cooler technology is available in the form of LCD screens that can create the 3D illusion without the need for glasses. Through clever and secret use of technology the LCD screen is capable of displaying the two different images in such a way that each eye only sees its correspondingly correct image and all without glasses. This technique so far cannot be done for a widely dispersed audience or a large one. The reason for this is that there is a sweet spot which the viewer has to be in in order to get the two images correctly aligned. If a viewer’s eyes are not correctly aligned to the images then they will not get the 3D illusion.

Currently available in the new Nintendo 3DS game system this technology may eventually be available for larger audiences as technology advances. The technology works for a portable gaming system as it’s usually a single person using them at any given time.

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